New amplifiers with audio applications-ICs and multichip modules

Infineon has proposed four new Merus brand IC amplifiers that combine existing amplifier products with audio applications (ICs and multi-chip modules).



With the new “Merus” brand for audio amplifier ICs, Infineon wants to surpass the advantages of amplifier ICs.

1. When sound is generated by the speaker, で is not distributed.

I can not cry but I can see it.

Small and light.

4. Flexible and determinable, but not only difficult to use with textiles.



The Merus amplifier is based on a new technology: multi-stage switching technology for audio and video amplifiers, multi-level converter technology It not only provides high efficiency, but also sound quality, size, output power, electromagnetic radiation and It also has a good influence on other audio amplifiers like parts cost.



Under the new Merus brand, Infineon bundles amplifier ICs for audio applications.

Infineon is transforming a new d 级 audio amplifier to control the power level of an analog 5-speed converter. These multistage d 级 amplifiers use additional power MOSFETs (built into the IC) and capacitors compared to conventional amplifiers.

This technique makes it possible to output audio signals with higher granularity, ie higher switching frequency and scalable output signal levels. Another advantage of the multistage d 级 amplifier is that it allows for a small 设计 and sleep mode with little measurable switching losses.



Four new Merus amps

Based on the new transformation technology, Infineon incorporates one of four integrated multi-stage d 级 audio amplifiers: MA12040 and MA12070 with analog audio input, MA12040P and MA12070P with digital input (I 2 S). Satisfied with the power consumption of the 250 毫 tile range, there is no output filter. Therefore, it is particularly suitable for portable battery drive devices and applications where the installation space is limited (when there is no space for a heat sink and there is an output filter).



The new Merus Class D amps of the UK MA12040 / P and MA12070 / P support up to 4 channels.

Conventional d 级 amplifiers operate only at higher volume levels and are more efficient. A realistic and typical audio playback that requires an average of about 1 watt of output power on its own is much higher power than the IC of the first generation Merus multi-stage class d audio amplifier currently presented .

The new audio amplifier IC supports up to 4 channel modes: PBTL (parallel bridge load), BTL (bridge load), or SE (single end) can be set. In PBTL mode, 16 large load currents in a single monolithic IC. Alternatively, a 4-channel IC can be used in the 2.1 system. For example, two drive a 20 watt range speaker (SE mode) and a 40 W woofer (BTL mode).

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The new Merus D 级 amplifiers MA12040 / P and MA12070 / P have built-in digital power supplies with low distortion (THD + N = 0.003%) and low EMI emissions. It is protected by a variety of built-in features such as low voltage shutdown (UVLO), short / low current and DC protection, low time warnings and error messages. Infineon offers a Merus d audio amplifier IC with integrated EPAD (exposed thermal pad) in a globally optimized 64-pin QFN package.